What do you call a serial killing watermelon?

A Slaughtermelon.

http://backpack.tf/item/290530682

Sale 1) Sold for a Scorching Flames Geisha Boy (60) + ~15 Keys in Items + 2 Keys

http://imgur.com/rDwr3R6

http://backpack.tf/profiles/76561198159542421/#!/compare/1455609600/1455696000 - Buyer

http://backpack.tf/profiles/76561198185122747/#!/compare/1455436800/1455782400 - Seller

http://www.tf2outpost.com/trade/27842805 - Capped by B/O of 70 Keys

Geisha Mini

http://backpack.tf/vote/id/56c7e642ba8d8866754b31b7 - 60 Keys

-----------------------------------------------------------------------------------------------

Sale 2) Sold for 85.5 Keys, which rounds to 86 Keys

http://imgur.com/sHAGKut

http://imgur.com/x4gjgu5

Credits to =TNW= Maximus and Verb_

http://backpack.tf/vote/id/56c1c9dab98d88ea7e2105a4